+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1518 Rovaniemi (1938 UA) Classification: Main-belt Asteroid          SPK-ID: 2001518 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 33 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1433816576881506 3.2076e-08   a 2.225499656030751 4.9305e-09 au q 1.906403826164653 7.0331e-08 au i 6.712371048781814 3.7814e-06 deg node 27.79430965020461 3.118e-05 deg peri 36.94561009963757 3.4293e-05 deg M 183.6537843572019 1.5006e-05 deg tp 2459594.523146075730 (2022-Jan-15.02314608) 5.128e-05 TDB period 1212.661875435014 3.32 4.0299e-06 1.103e-08 d yr n .2968675830357564 9.8654e-10 deg/d Q 2.544595485896849 5.6374e-09 au   Orbit Determination Parameters    # obs. used (total)      2580      data-arc span      33599 days (91.99 yr)      first obs. used      1928-10-07      last obs. used      2020-10-03      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .45628      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 04:18:12   Additional Information  Earth MOID = .923935 au   Jupiter MOID = 2.7612 au   T_jup = 3.624  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 12.4   n/a MPO265964   diameter diameter 8.480 km 0.167 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 5.249 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List: [Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Warner, B.D. (2009) Minor Planet Bull. 36, 109-116.] [Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.] geometric albedo albedo 0.295   0.063 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   1518 Rovaniemi (1938 UA)          Discovered 1938-Oct-15 by Vaisala, Y. at Turku Independent discovery Oct. 21 by E. Delporte, Uccle, was announced first. Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1938 UA = 1928 TL = 1951 SH  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Nov-30 18:58 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin